Agree Chestnut - I reckon she fancies Harry (and they're the same age), although he has a girlfriend already. She was speaking more on Friday's show than throughout the whole series put together!
Jas is very clever, but Harry reminds me of my son so I'd like him to win, as he's also a young army engineer, as he's been consistently great at the challenges and is thinking several steps ahead (but getting a bit over-confident now!) I think Harry is helped by his charisma.
It may all hinge on the fact that he collected the shield and only told a few people.